81868189 divided by 856 
The aim is to understand the frequency of 856 in 81868189.

On to step 1:
If we divide 8 by 856, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 856

Advancing to step 2:
856 goes into 81 0 times with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Grab the next digit (8) from the dividend, add it to 81, then carry on: 818 / 856

Moving on to step 3:
When dividing 818 by 856, we get 0 with a remainder of 818.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 818, we end up with 818.
Append the next digit (6) from the dividend to 818 and continue with: 8186 / 856

Advancing to step 4:
The number 856 fits into 8186 9 times, leaving a remainder of 482.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 7704 away from 8186, we end up with 482.
Grab the next digit (8) from the dividend, add it to 482, then carry on: 4828 / 856

On to step 5:
If we divide 4828 by 856, we get 5 and a remainder of 548.
The number 5 becomes the next digit in our result. 
Result so far: 95.0
Subtracting 4280 from 4828 leaves us with 548.
Take the next digit (1) from the dividend and append it to 548, then repeat: 5481 / 856

Step 6:
If we divide 5481 by 856, we get 6 and a remainder of 345.
Use 6 as the next digit of our solution. 
Result so far: 956.0
Deduct 5136 from 5481 and we're left with 345.
Include the next digit (8) from the dividend after 345, then repeat: 3458 / 856

On to step 7:
856 goes into 3458 4 times with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 9564.0
If we subtract 3424 from 3458, we get 34.
Append the next digit (9) from the dividend to 34 and continue with: 349 / 856

Advancing to step 8:
856 can be fit into 349 0 times, resulting in a remainder of 349.
The next digit of our result is 0. 
Result so far: 95640.0
Subtracting 0 from 349 leaves us with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Step 9:
If we divide 3490 by 856, we get 4 and a remainder of 66.
The next digit of our result is 4. 
Result so far: 95640.4
If we take 3424 away from 3490, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 10:
When dividing 660 by 856, we get 0 with a remainder of 660.
Record the quotient 0 as the next digit in the result. 
Result so far: 95640.4
Deduct 0 from 660 and we're left with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Step 11:
The number 856 fits into 6600 7 times, leaving a remainder of 608.
Write down 7 as next digit of the result. 
Result so far: 95640.407
Subtract 5992 from 6600 to get 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Let's proceed to step 12:
856 goes into 6080 7 times with a remainder of 88.
The number 7 becomes the next digit in our result. 
Result so far: 95640.4077
Subtract 5992 from 6080 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

The final result is 95640.4077 with a remainder of 0.00088.